[Abnormal origin of 1 of 2 pulmonary arteries from the ascending aorta].

In relation with 4 cases of anomalous branching of one pulmonary artery from the ascending aorta, the main clinical, angiographic, physiopathologic, therapeutic and embryologic features of this malformation were reviewed. It appeared that the natural history of this malformation is a severe one, and only a corrective surgical treatment is liable to secure survival and cure. This anomaly was also encountered, very rarely, in Fallot's tetralogy, and two cases of this combination were reported.